body{
    height: 100%;
}
.m-class{
    background: #fafafa;
    border-bottom: 1px solid #e5e5e5;
    z-index: 1000;
    height: 50px;
    margin-top: -7px;
    margin-left: -7px;
    width: 101%;
   
}
.m-class-left{
    position: fixed;
    right: 0;
    left: 0;
    width: 550px;
    top: 0;
    text-align: center;
    line-height: 50px;
    margin: 0 auto;
}
.m-class-left ul{
    list-style: none;
    margin-left: -199px;
    margin-top: -18px;
    padding: 0;
    margin: 0;
}
ul li{
    float: left;
    padding: 0 10px;
    line-height: 50px;
}
 ul .avn {
   
    color: #0e90d2;
   
}
.m-class-left a{

    text-decoration: none;
    border-radius: 0;
    color: rgb(167, 167, 167);
    background: 0 0;
  
}
.m-center{
  
}
.m-center h3{
    margin-top: 58px;
    border-bottom: 1px solid silver;
}

img{
    width: 50px;
    height: 50px;
    border-radius: 50%;
}
.m-center span{
    float: right;
   
}
.m-picture {

}